WO2011056076A1 - Solar cell roof tiles - Google Patents

Solar cell roof tiles Download PDF

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Publication number
WO2011056076A1
WO2011056076A1 PCT/NO2010/000360 NO2010000360W WO2011056076A1 WO 2011056076 A1 WO2011056076 A1 WO 2011056076A1 NO 2010000360 W NO2010000360 W NO 2010000360W WO 2011056076 A1 WO2011056076 A1 WO 2011056076A1
Authority
WO
WIPO (PCT)
Prior art keywords
panel
roofing
fluid
solar cell
heat
Prior art date
Application number
PCT/NO2010/000360
Other languages
French (fr)
Inventor
Finn Sandmael
Original Assignee
Flaax Holding As
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Flaax Holding As filed Critical Flaax Holding As
Priority to US13/508,317 priority Critical patent/US9909781B2/en
Priority to ES10828594.1T priority patent/ES2627681T3/en
Priority to AU2010315985A priority patent/AU2010315985B2/en
Priority to EP10828594.1A priority patent/EP2496892B1/en
Priority to CN201080056657.XA priority patent/CN102713455B/en
Publication of WO2011056076A1 publication Critical patent/WO2011056076A1/en

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24S—SOLAR HEAT COLLECTORS; SOLAR HEAT SYSTEMS
    • F24S20/00—Solar heat collectors specially adapted for particular uses or environments
    • F24S20/60—Solar heat collectors integrated in fixed constructions, e.g. in buildings
    • F24S20/69—Solar heat collectors integrated in fixed constructions, e.g. in buildings in the form of shingles or tiles
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
    • H01L31/00—Semiconductor devices sensitive to infrared radiation, light, electromagnetic radiation of shorter wavelength or corpuscular radiation and specially adapted either for the conversion of the energy of such radiation into electrical energy or for the control of electrical energy by such radiation; Processes or apparatus specially adapted for the manufacture or treatment thereof or of parts thereof; Details thereof
    • H01L31/04—Semiconductor devices sensitive to infrared radiation, light, electromagnetic radiation of shorter wavelength or corpuscular radiation and specially adapted either for the conversion of the energy of such radiation into electrical energy or for the control of electrical energy by such radiation; Processes or apparatus specially adapted for the manufacture or treatment thereof or of parts thereof; Details thereof adapted as photovoltaic [PV] conversion devices
    • H01L31/042—PV modules or arrays of single PV cells
    • H01L31/05—Electrical interconnection means between PV cells inside the PV module, e.g. series connection of PV cells
    • H01L31/0504—Electrical interconnection means between PV cells inside the PV module, e.g. series connection of PV cells specially adapted for series or parallel connection of solar cells in a module
    • H01L31/0508—Electrical interconnection means between PV cells inside the PV module, e.g. series connection of PV cells specially adapted for series or parallel connection of solar cells in a module the interconnection means having a particular shape
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
    • H01L31/00—Semiconductor devices sensitive to infrared radiation, light, electromagnetic radiation of shorter wavelength or corpuscular radiation and specially adapted either for the conversion of the energy of such radiation into electrical energy or for the control of electrical energy by such radiation; Processes or apparatus specially adapted for the manufacture or treatment thereof or of parts thereof; Details thereof
    • H01L31/04—Semiconductor devices sensitive to infrared radiation, light, electromagnetic radiation of shorter wavelength or corpuscular radiation and specially adapted either for the conversion of the energy of such radiation into electrical energy or for the control of electrical energy by such radiation; Processes or apparatus specially adapted for the manufacture or treatment thereof or of parts thereof; Details thereof adapted as photovoltaic [PV] conversion devices
    • H01L31/052—Cooling means directly associated or integrated with the PV cell, e.g. integrated Peltier elements for active cooling or heat sinks directly associated with the PV cells
    • H01L31/0521—Cooling means directly associated or integrated with the PV cell, e.g. integrated Peltier elements for active cooling or heat sinks directly associated with the PV cells using a gaseous or a liquid coolant, e.g. air flow ventilation, water circulation
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02S—GENERATION OF ELECTRIC POWER BY CONVERSION OF INFRARED RADIATION, VISIBLE LIGHT OR ULTRAVIOLET LIGHT, e.g. USING PHOTOVOLTAIC [PV] MODULES
    • H02S20/00—Supporting structures for PV modules
    • H02S20/20—Supporting structures directly fixed to an immovable object
    • H02S20/22—Supporting structures directly fixed to an immovable object specially adapted for buildings
    • H02S20/23—Supporting structures directly fixed to an immovable object specially adapted for buildings specially adapted for roof structures
    • H02S20/25—Roof tile elements
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02S—GENERATION OF ELECTRIC POWER BY CONVERSION OF INFRARED RADIATION, VISIBLE LIGHT OR ULTRAVIOLET LIGHT, e.g. USING PHOTOVOLTAIC [PV] MODULES
    • H02S40/00—Components or accessories in combination with PV modules, not provided for in groups H02S10/00 - H02S30/00
    • H02S40/40—Thermal components
    • H02S40/44—Means to utilise heat energy, e.g. hybrid systems producing warm water and electricity at the same time
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
    • Y02B10/00—Integration of renewable energy sources in buildings
    • Y02B10/10—Photovoltaic [PV]
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
    • Y02B10/00—Integration of renewable energy sources in buildings
    • Y02B10/20—Solar thermal
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
    • Y02B10/00—Integration of renewable energy sources in buildings
    • Y02B10/70—Hybrid systems, e.g. uninterruptible or back-up power supplies integrating renewable energies
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E10/00—Energy generation through renewable energy sources
    • Y02E10/40—Solar thermal energy, e.g. solar towers
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E10/00—Energy generation through renewable energy sources
    • Y02E10/40—Solar thermal energy, e.g. solar towers
    • Y02E10/44—Heat exchange systems
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E10/00—Energy generation through renewable energy sources
    • Y02E10/50—Photovoltaic [PV] energy
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E10/00—Energy generation through renewable energy sources
    • Y02E10/60—Thermal-PV hybrids

Definitions

  • the present invention regards a device for utilizing solar energy, especially in the form of panels designed as roofing tiles.
  • Solar energy has an energy density of approximately 1 kW/m2 at perpendicularly incident sunlight, distributed across a wide spectrum comprising infrared, visible, and ultraviolet light. This received energy may be utilized in several ways, among other by semiconductor based solar cells for electric current generation, and solar energy collectors for heating a medium for heating purposes.
  • Solar cell panels designed as roofing tiles are known, see US patent 5 986 203; "Solar cell roof tile and method of forming same”, disclosing roofing tiles comprising a solar cell, and US patent 5 768 831 ; "Rooftile support for photocell panel”, disclosing roofing tiles wherein a solar cell is provided onto each rooftile.
  • Solar collectors for roof mounting are known, ref. US patent 4 202 319; "Building roof with solar collector”, disclosing roofing tiles comprising a solar collector, and US patent 4 083 360, disclosing a solar energy collecting system wherein translucent roofing tiles allow sunlight through to an absorbing sheet, wherein pipes with a liquid heat medium are provided to carry the heat.
  • the utilization factor is low, approx. 10 % for solar cells, and the efficiency is reduced when the temperature rises.
  • the complexity is high, and installation is preferably performed by specialists, this limits the spread in the market, especially in the do-it-yourself market;
  • Solar cells and solar collectors are fragile, which requires care at the production, installation, and maintenance such as for instance while removing snow from roof.
  • the object of the invention is to provide a sturdy device for efficient utilization of the energy of sunlight, suitable for easy production, installation and maintenance.
  • this object is achieved with a device for utilizing the solar energy.
  • This comprises a roof tiling base material and a panel with heat transfer between the surface and a fluid, wherein the panel is provided with at least one means for connecting to a collecting and distributing system for the heat transferring fluid.
  • a solar cell panel may also be provided to be cooled effectively during operation, the heat energy may simultaneously be utilized.
  • roofing battens are mounted as normally on furring strips mounted parallel to the slope of the roof. Some furring strips are adapted for connection of electrical conductors in the roofing battens as well as any fluid circuits in the roofing battens.
  • figure 1 is a schematic view of a typical roof tile with area suitable for arranging a solar cell, and wherein the cooling is by fluid flowing through cavity in the roof tile;
  • figure 2 is a schematic view of a typical roof tile with area suitable for arranging a panel for heat transfer, possibly with solar cell;
  • figure 3 is a schematic view of a typical roof tile with area suitable for arranging a solar cell, wherein the cooling is by fluid flowing through cavity between the roof tile and the base for the solar cell;
  • figure 4 is a schematic view of a typical implementation of roofing battens and furring strips for mounting of roofing tiles according to the invention
  • figure 5 is a schematic view of a heat circuit where the fluid cooling according to the invention is performed by roofing tiles with heat transfer panel without attached solar cell.
  • Figure 1 is a view of a roof tile system 100 comprising at least one roof tile 101 with a diamond shaped, indented area 102 provided to mount a panel 105 for heat transfer.
  • the panel 105 is a hollow element, typically produced from metal for good thermal conduction, and is equipped with pipe 106 which is in fluid communication with the cavity, for transport of fluid for transport of heat.
  • the panel 105 is provided onto the indented area 102 of the roof tile 101 for the pipes 106 to be thread through hole 103, for the pipes 106 to be fastened to a roofing batten 110 for mechanical attachment in a way which is similar to traditional mounting of roofing tiles on roofing battens as well as fluid connection to a collection and distribution system.
  • the roofing battens 1 10 are in at least one area connected together to for example a furring strip 1 12, with for example an adapter 113, so that a fluid for transport of heat is centralized collected and transferred. This facilitates laying of tubes and pipes and also secures correct spacing between the tiles.
  • a fastening peg 109 is used to attach each roof tile through hole 104 in the lower edge of the roof tile, for in this way to secure it against strong wind blowing roof tiles off the roof. This enables also keeping light roof tiles safe in position.
  • the fastening peg 109 may also be used as a step to stand on without causing damages.
  • a solar cell 107 may possibly be provided in such a way that the panel 105 maintains the solar cell 107 cool while also the thermal part of the received solar energy is utilized.
  • the solar cell has typically two electrodes for transfer of electric current; one rear side electrode which is in electric contact with the panel 105 and further through pipe 106 to the roofing batten 1 10 and from there to furring strip 1 12; and a front side electrode 108 which is in electrical contact through the fastening peg 109 with pin 109a through hole 104 to an electric rail 1 1 1 which may correspond to the roofing batten 110 for other roof tiles which are offset laterally and in height relative to the roof tile 101.
  • the roofing batten 1 10, the furring strip 1 12 and the adapter 1 13 are provided with means for transfer and adaption of electric energy in addition to means for fluid transport.
  • the adaption of electric energy comprises regulating the voltage supplied to the furring strip 1 12 and protection against electrical current flowing in the wrong direction.
  • the solar cell 107 is mounted onto the heat transfer panel 105 before this assembly then is mounted on the roof tile 101. This concentrates production requiring finer tolerances placing higher requirements for cleanliness in one place, before an assembly on more coarse material where cleanliness and tolerances are lower. Such mounting of solar cells makes the solar cell better protected and sturdier for later handling.
  • Figure 2 shows an implementation of an individual roof tile 200 having an area 202 for mounting of a solar cell.
  • FIG. 3 shows an arrangement where the base is formed as elongated elements 300 which are provided with internal channels 301 for fluid transport, wherein the fluid transports the heat from a solar cell 302 and away.
  • the elements are connected in a manifold, typically in ridges and lower edges of roof, for collection of the fluid for further transfer.
  • the roof tile units may also be produced as panels of a plurality of assembled panels. This facilitates the mounting as there will be fewer and larger units and fewer connection points to connect to. Another advantage is that the electrical connections may be provided as connections of individual panels vertically or diagonally, for in this way to avoid negative effects of shadow over the roofs or walls, for example from trees or poles. With diamond shaped individual roof tiles an easy way to connect panels diagonally is provided.
  • Each roof tile may comprise a plurality of solar cells. A combination of 3x3 panels in one compound panel, wherein each panel comprises 4 solar cells and each solar cell outputs approximately 1 V, will provide approximately 36 V which is within the limit of what is allowed in the DIY market.
  • FIG 4 shows an implementation 400 where the pipes 106 are connected to the roofing batten 1 10 so that fluid flows from one of the two holes 402 and 403 to the other hole. At least one of channels 404 and 405 for fluid transport is provided to make electric contact from an electrode through the pipes 106, while the fastening peg 109 with the pin 109a makes electric contact from another electrode to a fastening device 409 in rail 11 1 thereby to provide an electric circuit.
  • the roofing battens are mounted in the normal manner on furring strips, wherein at least one furring strip is adapted to terminate fluid flows and electric current from roofing battens and rails.
  • the roofing batten 1 10 is connected together with the furring strip 1 12 by the adapter 113 so that a disconnectable connection for fluid flow and electric current between the roofing batten and the rail is established.
  • the furring strip 1 12 comprises means 406 which are provided for transfer of fluid flow between a plurality of roofing battens, and electric conductor 407 for transmission of electric current between a plurality of roofing battens and electrical conductor 408 for transmission of electrical current between a plurality of rails.
  • the furring strip 1 12 also comprises end termination for fluid flow in junctions 410 and 41 1 and end terminations for electric current in connections 412 and 413.
  • the roofing tiles are cooled by a sprinkler facility provided on top in a way that the water flows downwards the roofing tile system, where the water optionally passes through cavities beneath the solar cell 107. Filter may be provided in the fastening peg 109, which will then lead water to the next roofing tile below. The heated water is collected in gutters, thus exploiting existing structures in most houses.
  • Thermal energy is more difficult to convert to other forms of energy than electric energy is.
  • a result of this is that one may provide more thermal energy than can be directly utilized, especially in the warm season, even after heating water heater, rooms and thermal accumulator for storing heat until a need appears.
  • a possible solution is using a Stirling engine to convert thermal energy to mechanical energy, and possibly from there to electric energy. In such cases a cold side with a large thermal sink is required.
  • Figure 5 shows a system where panel 501 is undergoing heating and provides thermal energy, and panel 502 is a thermal sink.
  • Junction box 503 distributes usable heat to devices comprising heating system 504, typically implemented as radiators and water pipes, water heater 505, and Stirling engine 506.

Abstract

A panel (105) is provided for utilizing solar energy, especially in the form of panels designed as roof tiles (101), wherein the heat is transferred from panel to fluid or vice versa. On this panel one or more solar cell panels (107) can be provided so that it is cooled effectively during operation, while heat energy simultaneously may be utilized. Panels, for example designed as roof tiles, individually or assembled, are mounted on roofing battens (110) suitable for the purpose, and connected to electrical connection points and bushings for fluid transport. The roofing battens (110) are mounted on furring strips (112) in the usual way. Some furring strips are used for connection of electrical conductors in the flooring battens (112) and any fluid circuits in the flooring battens (110).The construction facilitates installing and maintenance.

Description

Solar cell roof tiles
Technical Area
The present invention regards a device for utilizing solar energy, especially in the form of panels designed as roofing tiles.
Technical background
Solar energy panels have been known and used for a number of years, however they have become more interesting lately due to the increasing energy prices, environmental concerns, and an accelerating development of the production of solar cells for electric energy generation.
Solar energy has an energy density of approximately 1 kW/m2 at perpendicularly incident sunlight, distributed across a wide spectrum comprising infrared, visible, and ultraviolet light. This received energy may be utilized in several ways, among other by semiconductor based solar cells for electric current generation, and solar energy collectors for heating a medium for heating purposes.
Solar cell panels designed as roofing tiles are known, see US patent 5 986 203; "Solar cell roof tile and method of forming same", disclosing roofing tiles comprising a solar cell, and US patent 5 768 831 ; "Rooftile support for photocell panel", disclosing roofing tiles wherein a solar cell is provided onto each rooftile.
Solar collectors for roof mounting are known, ref. US patent 4 202 319; "Building roof with solar collector", disclosing roofing tiles comprising a solar collector, and US patent 4 083 360, disclosing a solar energy collecting system wherein translucent roofing tiles allow sunlight through to an absorbing sheet, wherein pipes with a liquid heat medium are provided to carry the heat.
The problems with the known art and the products on the markets are many:
The utilization factor is low, approx. 10 % for solar cells, and the efficiency is reduced when the temperature rises.
For solar energy collectors the nature of energy is heat and not electrical energy, this limits the area of usability and the amount of energy which may be utilized in practice;
The complexity is high, and installation is preferably performed by specialists, this limits the spread in the market, especially in the do-it-yourself market;
Solar cells and solar collectors are fragile, which requires care at the production, installation, and maintenance such as for instance while removing snow from roof.
It is therefore a need for a solution which easily may be produced and installed, and which is energy efficient. The object of the invention
In view of the known art, the object of the invention is to provide a sturdy device for efficient utilization of the energy of sunlight, suitable for easy production, installation and maintenance.
Summary of the invention
According to the invention this object is achieved with a device for utilizing the solar energy. This comprises a roof tiling base material and a panel with heat transfer between the surface and a fluid, wherein the panel is provided with at least one means for connecting to a collecting and distributing system for the heat transferring fluid. Onto this panel a solar cell panel may also be provided to be cooled effectively during operation, the heat energy may simultaneously be utilized.
Panels, for example designed as individual or assembled roofing tiles, mounted onto suitable roofing battens and connected to electrical junction points and to bushings for fluid transport. Roofing battens are mounted as normally on furring strips mounted parallel to the slope of the roof. Some furring strips are adapted for connection of electrical conductors in the roofing battens as well as any fluid circuits in the roofing battens.
Short description of the drawings
The invention will in the following be described closer under reference to the drawings of the figures, showing a plurality of examples of implementations, and where
figure 1 is a schematic view of a typical roof tile with area suitable for arranging a solar cell, and wherein the cooling is by fluid flowing through cavity in the roof tile;
figure 2 is a schematic view of a typical roof tile with area suitable for arranging a panel for heat transfer, possibly with solar cell;
figure 3 is a schematic view of a typical roof tile with area suitable for arranging a solar cell, wherein the cooling is by fluid flowing through cavity between the roof tile and the base for the solar cell;
figure 4 is a schematic view of a typical implementation of roofing battens and furring strips for mounting of roofing tiles according to the invention;
figure 5 is a schematic view of a heat circuit where the fluid cooling according to the invention is performed by roofing tiles with heat transfer panel without attached solar cell. Review of reference numbers used in the drawings and in the below description
Figure 1 is a view of a roof tile system 100 comprising at least one roof tile 101 with a diamond shaped, indented area 102 provided to mount a panel 105 for heat transfer. The panel 105 is a hollow element, typically produced from metal for good thermal conduction, and is equipped with pipe 106 which is in fluid communication with the cavity, for transport of fluid for transport of heat.
The panel 105 is provided onto the indented area 102 of the roof tile 101 for the pipes 106 to be thread through hole 103, for the pipes 106 to be fastened to a roofing batten 110 for mechanical attachment in a way which is similar to traditional mounting of roofing tiles on roofing battens as well as fluid connection to a collection and distribution system.
The roofing battens 1 10 are in at least one area connected together to for example a furring strip 1 12, with for example an adapter 113, so that a fluid for transport of heat is centralized collected and transferred. This facilitates laying of tubes and pipes and also secures correct spacing between the tiles.
When each tile is attached to the roofing battens, a fastening peg 109 is used to attach each roof tile through hole 104 in the lower edge of the roof tile, for in this way to secure it against strong wind blowing roof tiles off the roof. This enables also keeping light roof tiles safe in position. The fastening peg 109 may also be used as a step to stand on without causing damages.
On the panel 105 for heat transfer, a solar cell 107 may possibly be provided in such a way that the panel 105 maintains the solar cell 107 cool while also the thermal part of the received solar energy is utilized. The solar cell has typically two electrodes for transfer of electric current; one rear side electrode which is in electric contact with the panel 105 and further through pipe 106 to the roofing batten 1 10 and from there to furring strip 1 12; and a front side electrode 108 which is in electrical contact through the fastening peg 109 with pin 109a through hole 104 to an electric rail 1 1 1 which may correspond to the roofing batten 110 for other roof tiles which are offset laterally and in height relative to the roof tile 101.
In an implementation with solar cell on panel for heat transfer, the roofing batten 1 10, the furring strip 1 12 and the adapter 1 13 are provided with means for transfer and adaption of electric energy in addition to means for fluid transport. The adaption of electric energy comprises regulating the voltage supplied to the furring strip 1 12 and protection against electrical current flowing in the wrong direction.
It is an advantage that during manufacturing, the solar cell 107 is mounted onto the heat transfer panel 105 before this assembly then is mounted on the roof tile 101. This concentrates production requiring finer tolerances placing higher requirements for cleanliness in one place, before an assembly on more coarse material where cleanliness and tolerances are lower. Such mounting of solar cells makes the solar cell better protected and sturdier for later handling.
Figure 2 shows an implementation of an individual roof tile 200 having an area 202 for mounting of a solar cell.
Heat transfer may occur in other ways which are also suitable for this invention. Figure 3 shows an arrangement where the base is formed as elongated elements 300 which are provided with internal channels 301 for fluid transport, wherein the fluid transports the heat from a solar cell 302 and away. The elements are connected in a manifold, typically in ridges and lower edges of roof, for collection of the fluid for further transfer.
The roof tile units may also be produced as panels of a plurality of assembled panels. This facilitates the mounting as there will be fewer and larger units and fewer connection points to connect to. Another advantage is that the electrical connections may be provided as connections of individual panels vertically or diagonally, for in this way to avoid negative effects of shadow over the roofs or walls, for example from trees or poles. With diamond shaped individual roof tiles an easy way to connect panels diagonally is provided. Each roof tile may comprise a plurality of solar cells. A combination of 3x3 panels in one compound panel, wherein each panel comprises 4 solar cells and each solar cell outputs approximately 1 V, will provide approximately 36 V which is within the limit of what is allowed in the DIY market.
For easy installation it is advantageous that roofing battens and furring strips are provided with prefabricated fittings for installation of the roof tile system. Figure 4 shows an implementation 400 where the pipes 106 are connected to the roofing batten 1 10 so that fluid flows from one of the two holes 402 and 403 to the other hole. At least one of channels 404 and 405 for fluid transport is provided to make electric contact from an electrode through the pipes 106, while the fastening peg 109 with the pin 109a makes electric contact from another electrode to a fastening device 409 in rail 11 1 thereby to provide an electric circuit. The roofing battens are mounted in the normal manner on furring strips, wherein at least one furring strip is adapted to terminate fluid flows and electric current from roofing battens and rails. The roofing batten 1 10 is connected together with the furring strip 1 12 by the adapter 113 so that a disconnectable connection for fluid flow and electric current between the roofing batten and the rail is established. The furring strip 1 12 comprises means 406 which are provided for transfer of fluid flow between a plurality of roofing battens, and electric conductor 407 for transmission of electric current between a plurality of roofing battens and electrical conductor 408 for transmission of electrical current between a plurality of rails. The furring strip 1 12 also comprises end termination for fluid flow in junctions 410 and 41 1 and end terminations for electric current in connections 412 and 413. In another implementation the roofing tiles are cooled by a sprinkler facility provided on top in a way that the water flows downwards the roofing tile system, where the water optionally passes through cavities beneath the solar cell 107. Filter may be provided in the fastening peg 109, which will then lead water to the next roofing tile below. The heated water is collected in gutters, thus exploiting existing structures in most houses.
Thermal energy is more difficult to convert to other forms of energy than electric energy is. A result of this is that one may provide more thermal energy than can be directly utilized, especially in the warm season, even after heating water heater, rooms and thermal accumulator for storing heat until a need appears. A possible solution is using a Stirling engine to convert thermal energy to mechanical energy, and possibly from there to electric energy. In such cases a cold side with a large thermal sink is required. According to this invention it is also provided a possibility for using elements in the shadow like a radiator, for in this way to dissipate heat by convection and radiation. Areas which are not sufficiently lit by the sun to make the use of solar cells profitable may instead be provided with roofing tiles provided with panel for heat transfer 105 without solar cell 107. Figure 5 shows a system where panel 501 is undergoing heating and provides thermal energy, and panel 502 is a thermal sink. Junction box 503 distributes usable heat to devices comprising heating system 504, typically implemented as radiators and water pipes, water heater 505, and Stirling engine 506.
It may also be advantageous to utilize the temperature difference between roofing tiles and water heater at night, especially in areas where there are great differences between day and night temperatures, like for example in a desert. In addition to increasing the efficiency due to temperature difference between day and night, this exposes the panels to lesser temperature oscillations by keeping fluid flowing through also while the sun goes down, than if the fluid flowing through had been discontinued.

Claims

181908-SRG Claims
1. A device for utilizing solar energy, especially associated with an assembly of roofing tiles covering a roof surface, characterized in comprising;
a roofing tile formed by a base material (101, 300) provided with an area (102); and
A panel (105) for heat transfer of heat between the surface and a fluid, wherein the panel (105) is provided with at least one pipe (106) for connection to a collection and distribution system for the heat transferring fluid.
2. The device according to claim 1, characterized in that the base material (300) is provided with channels (301), so that the heat transfer is by fluid flowing through channels (301) provided in the base material (300).
3. The device according to claims 1 - 2, characterized in that the panel (105) is provided with a cavity to enable heat transfer by fluid flow through the panel (105) for heat transfer provided on the base material.
4. The device according to claim 3, characterized in that in the at least one pipe (106) is arranged for connection to roofing batten (1 10), wherein the roofing battens (110) are comprised by the collecting and distribution system for the heat transferring fluid.
5. The device according to claim 4, characterized in that the roofing battens (110) for transferring the fluid for heat transfer are arranged for connection to furring strips (1 12), wherein the furring strips (1 12) are comprised by the collecting and distribution system for the heat transferring fluid.
6. The device according to claim 5, characterized in that at least one solar cell panel (107, 302) is provided on the panel (105, 300) for transfer of heat.
7. Device according to claim 6, characterized in that the at least one solar cell panel (107, 302) is provided with connecting elements so that electric current from the at least one solar cell panel (107, 302) is transferred to the roofing battens (1 10) and rails (1 1 1), wherein connecting elements comprising pipes (106) and a pin (109a) for further transferring of electric current.
8. The device according to claim 7, characterized in that the roofing battens (1 10) and the rails (1 1 1) for transferring of electric current are connected to the furring strips (1 12) with an adapter unit (1 13) for further transferring of electric current.
9. The device according to claims 1 - 8, characterized in that the roof tiles are assembled into panels with a plurality of assembled panels.
10. The device according to claim 1 - 9, characterized in that electrical connections in assembled panels are provided as connections of individual panels vertically or horizontally.
PCT/NO2010/000360 2009-11-06 2010-10-13 Solar cell roof tiles WO2011056076A1 (en)

Priority Applications (5)

Application Number Priority Date Filing Date Title
US13/508,317 US9909781B2 (en) 2009-11-06 2010-10-13 Solar cell roof tiles
ES10828594.1T ES2627681T3 (en) 2009-11-06 2010-10-13 Solar cell roof tiles
AU2010315985A AU2010315985B2 (en) 2009-11-06 2010-10-13 Solar cell roof tiles
EP10828594.1A EP2496892B1 (en) 2009-11-06 2010-10-13 Solar cell roof tiles
CN201080056657.XA CN102713455B (en) 2009-11-06 2010-10-13 Solaode roof tiles

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
NO20093299 2009-11-06
NO20093299A NO333520B1 (en) 2009-11-06 2009-11-06 solar tariff

Publications (1)

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WO2011056076A1 true WO2011056076A1 (en) 2011-05-12

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US (1) US9909781B2 (en)
EP (1) EP2496892B1 (en)
CN (1) CN102713455B (en)
ES (1) ES2627681T3 (en)
NO (1) NO333520B1 (en)
WO (1) WO2011056076A1 (en)

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ITFI20120237A1 (en) * 2012-11-05 2014-05-06 Raoul Cangemi SOLAR BATTERY RECHARGEABLE PANEL
WO2015130740A2 (en) 2014-02-25 2015-09-03 Sun Drum Solar, Llc A hybrid supplemental solar energy collection and dissipation system with one or more heat pumps
EP3111485A4 (en) * 2014-02-25 2018-03-28 Sun Drum Solar Llc A hybrid supplemental solar energy collection and dissipation system with one or more heat pumps

Also Published As

Publication number Publication date
EP2496892B1 (en) 2017-03-01
EP2496892A1 (en) 2012-09-12
CN102713455B (en) 2016-10-26
ES2627681T3 (en) 2017-07-31
NO333520B1 (en) 2013-07-01
EP2496892A4 (en) 2013-06-05
US9909781B2 (en) 2018-03-06
AU2010315985A1 (en) 2012-06-14
US20120279555A1 (en) 2012-11-08
CN102713455A (en) 2012-10-03
NO20093299A1 (en) 2011-05-07

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